A handwritten sheet of lyrics for "While My Guitar Gently Weeps" is up for auction via Moments in Time.
According to a letter of authenticity dating from 2005, the sheet features lyrics in both George Harrison and Ringo Starr's hands. Evidently Ringo may've been helping to put down or change some of the song's words.
Here's the sheet, along with the letter of authenticity. The starting bid is $195,000.